Other (Income) Expense, Net (Tables)

9 Months Ended

Sep. 30, 2020

Other Income and Expenses [Abstract]

Other (Income) Expense, Net

Other (income) expense, net, consisted of: 

	Three Months Ended September 30,				Nine Months Ended September 30,
($ in millions)	2020		2019		2020		2019
Interest income	$	(9)	$	(61)	$	(48)	$	(225)
Interest expense	203		231		624		674
Exchange losses	10		38		89		166
Income from investments in equity securities, net (1)	(360)		(16)		(964)		(50)
Net periodic defined benefit plan (credit) cost other than service cost	(88)		(128)		(259)		(409)
Other, net	(68)		(29)		(72)		206
	$	(312)	$	35	$	(630)	$	362

(1)    Includes net realized and unrealized gains and losses from investments in equity securities either owned directly or through ownership interests in investment funds. Unrealized gains and losses from investments that are directly owned are determined at the end of the reporting period, while ownership interests in investment funds are accounted for on a one quarter lag.